Question

Which mineral is required for the synthesis of thyroid hormones and prevents goiter?

• A. Zinc
• B. Iron
• C. Iodine
• D. Selenium

Hint:

Link iodine with the thyroid. Deficiency of iodine causes goiter, especially in populations without iodized salt in their diets.

Answer 1

The Correct Option is C

The thyroid gland produces hormones like thyroxine (T₄) and triiodothyronine (T₃), which regulate metabolism.
These hormones require iodine for their synthesis.
If the body lacks sufficient iodine, the thyroid enlarges in an effort to capture more iodine from the bloodstream — this enlargement is known as a goiter.
Now let’s analyze the other options:
- Zinc is important for immune function and enzyme activity, but not directly for thyroid hormones.
- Iron is required for hemoglobin production, not thyroid function.
- Selenium plays a supportive role in thyroid function, but it is not the primary mineral required for hormone synthesis or goiter prevention.
Hence, iodine is the key mineral that prevents goiter and is essential for thyroid hormone synthesis.